Why do derek and addison break up

Two weeks later, Addison collapsed at the practice as a side-effect to the hormone treatment. That made her decide that the embryo transfer would be it: she'd either be pregnant or not.

After she was fully recovered, they did the transfer. On Thanksgiving, Addison did a pregnancy test. In Meredith's dream , Derek and Addison are still in an unhappy marriage and Addison is pregnant with their child, though the child is later revealed to be Mark's.

Mere hours after delivering a baby at St. Ambrose Hospital , Addison got a call from her social worker saying that a birth mom had chosen her. She returned to the hospital, shocked to find that it was Judi , the same woman whose baby she had delivered.

Judi had decided she couldn't find a better mom for the baby, and that it must have been fate since Addison was the one who delivered the baby boy. Addison named him Henry Montgomery. As part of her research into uterine transplants, Addison travelled to Seattle to perform a uterine transplant on Tovah Freedman , who had her support system in Seattle.

Addison reached out to Richard if there was an OR available for her and agreed to make her return a grand rounds teaching opportunity for the residents, whom he mentioned were behind. On the day of the surgery, Seattle was going through a heatwave. Addison arrived at the skills lab to introduce herself to the group of residents. En route to the patient, she explained her research and quizzed Levi on the pelvic anatomy. When he answered correctly, she allowed him to present the case and upon seeing a connection between him and the Jewish patient, she chose him to scrub in with her along with Richard.

The other residents gathered in the gallery to observe and Addison kept them engaged with a multitude of questions. In the middle of the procedure, the HVAC system broke down. The temperature in the OR quickly rose yet Addison refused to close up the patient despite Richard's warning about the risk of infection. To work faster, Addison requested Meredith due to her experience with microvascular anastomosis of the abdomen. Meredith soon joined her in the OR and they congratulated one another on their professional accomplishments.

As they operated, Addison asked Meredith what big thing was next for her. Meredith revealed that she had some idea but she needed to sort out things logistically and have a difficult conversation with Richard.

After evacuating a clot, Meredith and Addison successfully finished the procedure. As they left the OR, they heard the residents gossiping about the tension between them.

However, once alone on the elevator with Meredith, Addison broke down crying because coming here made Derek's death all too real for her. Meredith said he was there and in her kids is well, whom she invited Addison to meet over dinner at her house. Addison then told Meredith to fight for this big project if she believed in it, stating Meredith had never been one to shy away to fight for what she loved. Everything was well. Richard congratulated her and Addison told him the residents were not as bad as he had made them out to be.

He couldn't help but point out the difference between the current generation and Addison and Derek's generation, stating the current residents complained a lot. Addison pointed out they were simply standing up for themselves and refusing to be worked to death in a system that could be considered inhumane.

She considered that progress and stated there was always room for improvement in the medical education system. He agreed and told her he was glad to see her again. Addison then finally met up with Amelia in the lobby. After a long hug, Addison told her about Meredith's invitation. Amelia took her home and introduced her to Zola and Bailey.

Addison got emotional upon meeting them and sat down with them to have ice cream for dinner. Addison is a very confident, smart, and poised woman. She can be described as cold and unforgiving, however, she is also quite warm and kind. She is also very concentrated and dedicated to her work, as she is considered the best in her field. Addison is sometimes difficult and uncompromising but she can be very kind and accepting. Addison describes herself as a worrier; she constantly worries about what's happening and what's not happening.

Professionally, she is very confident, but not personally. She likes to think that worrying prepares her for whatever may happen. Addison met her future husband, Derek Shepherd , in medical school in the summer. Their relationship grew and they eventually married.

Derek once wrote a song for her. After medical school, Addison and Derek became extremely successful in their respective fields and each began their own practice in New York. However, this strained their marriage. Addison was married to Derek Shepherd for eleven years before eventually sleeping with Derek's best friend, Mark Sloan , which prompted Derek to leave New York for Seattle at the request of their old friend and mentor, Richard Webber.

After she and Derek initially separated, she tried to get over him, even hoping that dying her hair blond would help. She remained in New York and lived with Mark for two months, during which she became pregnant with Mark's child but she chose to have an abortion. The relationship ended when Mark cheated on Addison and Richard Webber brought her to Seattle Grace for a consult on a difficult case.

Addison was unaware that Derek still had feelings for Meredith. When Addison discovered that her husband slept with Meredith at the hospital-sponsored prom, Addison in a drunken haze called Mark Sloan to Seattle.

She and Derek agreed that their marriage was over and started divorce proceedings. She asked Mark to go back to New York, but he stayed, expressing his desire to continue their relationship. When the divorce was finalized, Addison dropped the "Shepherd" from her last name.

Wanting to make a fresh start, Derek happily relinquished most of their shared properties their Brownstone in Manhattan and a residence in The Hamptons to her believing that she deserved it as his initial impression was that she had only had a one-night stand with Mark while he carried on an affair with Meredith. She stayed in Seattle for a long while after and a possibility of a relationship between her and Alex Karev was hinted at when they kissed in Joe's bar.

She felt it was too strange though and he said he didn't care so the relationship was not brought ahead any further. During the 60 days that Mark and Addison were trying to remain celibate to give themselves a chance, she slept with Alex.

However, despite Addison wanting more, he wasn't ready for that. Addison and Mark originally met in med school. She cheated on her husband, Derek, with him.

After Derek left for Seattle, Addison and Mark lived together for two months, during which time she became pregnant. She had an abortion, and Mark eventually cheated on her. After finding out Meredith and Derek slept together at the prom, she called Mark over to Seattle and slept with him again. Mark decided to move to Seattle in hopes of pursuing a relationship with Addison. On the first anniversary of the day she discovered she was pregnant, Addison and Mark made a deal.

If they both could abstain from sex for 60 days she would be willing to try a real relationship with him. She doesn't hold up her end of the bargain when she engaged in a sexual encounter with Alex at the hospital. Mark learned of this after witnessing them stumbling out of an on-call room.

She was spared from confessing, however, when Mark selflessly lied to her by telling her he had broken their promise long before. He felt that although he had feelings for her, she shouldn't have to feel guilty.

They had sex several times, which prompted Addison to ask Mark if he truly wanted to have a relationship with her because she could make it work.

However, Mark was still in love with Lexie, so he apologized to Addison and turned her down. When she left Seattle Grace Hospital for a private practice in L. A, she had a brief interest in her co-worker Pete whom she kissed but gave up on any potential romance between the two after Pete stood her up for a date. Later, Pete and Addison reconnected at a hospital event and went back to her house to have pizza and watch lame TV shows, and ended up having sex.

They started a relationship that they described as "helping each other" and Addison decided to move on from Sam since he was seemingly happy with his new girlfriend, making them officially a couple. When Pete was sick and Addison was looking after Lucas, Pete said "I love you, Violet " to Addison while on fever medication, leading Addison to confront Pete six weeks later.

Pete states that he will always love Violet as she is the mother of his child, but he wants to be with Addison. Violet returns from Costa Rica and Addison tells her that Pete will pick her because she is Lucas' mother. Later on the porch, Sam tells Addison he is sick of doing the right thing and should do the wrong thing, and then kisses her as Pete walks in.

Addison was then asked out by Kevin Nelson , a police officer. Unfortunately, her trust issues interfered with her and Kevin, issues that resulted in her jealously following Kevin after she thought he was having an affair and ending with her arrest by the SWAT team. Nonetheless, she confessed her issues to Kevin and they resumed their relationship. But more troubles came when Addison's brother came to visit and told Kevin that she was just "enjoying him".

When he hadn't called Addison back; she had thought he was avoiding her, but would find out he had been shot. When her brother left; Kevin moved in with her while he was recovering.

While Addison now had to deal with Charlotte who was opening up a competing practice on the fourth floor, she was more annoyed by Dr. Wyatt Lockhart , a doctor working for Charlotte's practice who steals a patient of Addison's and convinces Naomi to work for her. In the midst of this relationship, Addison and Kevin's different lifestyles get in the way of their relationship leading to him moving out.

But Addison later calls him telling him she misses him, and they make up. However, Addison kisses Wyatt after seeing him for who he really is, not the arrogant, headline grabber she thought he was. Kevin repeatedly questions her where she was that night and believes she's lying, Addison claims she was working, and just as Kevin was finally able to drop the questioning, she admits she kissed another man, and they break up.

As Addison goes to Wyatt to try a new relationship, she catches Naomi having sex with Archer instead. Noah and Addison frequently met in the scrub room over three months, one of them always finishing surgery and scrubbing out and one scrubbing in, leading to their greeting of "Finishing or starting?

They both continued to flirt, not knowing each other's names, and eventually meet in the doctor's lounge where Noah asks for her name. Looking shocked, he quickly leaves. Addison later meets him as the husband of one of her pregnant patients, Morgan Gellman. Upon this discovery, Addison quickly removed herself from Morgan's case, as she was not comfortable with her feelings for Noah while she treated his wife, feelings which Noah reciprocates.

Addison decides not to make a move in their relationship, refusing to be a homewrecker, after her past mistakes with her ex-husband and his best friend.

Noah, however, asks her not to leave the case, as she is the best in her field and Morgan cannot lose another child she had a string of miscarriages before seeing Addison , and he will keep his feelings for Addison in check.

However, Noah cannot help the way he feels, and Morgan realizes her marriage is in jeopardy, asking Addison to save her child, as that is all that is keeping her and Noah together. She says she sees it in Noah's eyes, he's there, but he's not quite there. When Addison has to perform surgery on Morgan, Noah is not there for her and Morgan is willing to put off the surgery to have Addison find Noah and he eventually does go into the OR to be there for Morgan, with a push from Addison.

Sam asked Addison out when they were in med school, but Addison declined because Naomi was in love with him. When Addison moved to LA, she bought the house next door to Sam, leading to their developing friendship. Addison and Sam kissed after a hiking experience gone wrong while discussing what would have happened had Addison said yes to Sam in med school.

They kissed twice more and Sam propositioned Addison to develop their relationship, but Addison said no because Naomi was her best friend. Sam dated another Neonatal surgeon, leading Addison to date Pete , although she still loved Sam, and she is seen constantly talking about him to Pete. Sam and Addison had an off and on relationship for a long time.

The main reason for their relationship troubles was that Addison wanted a child, but Sam had Maya, and Maya's daughter, and didn't want more kids. After Addison adopted Henry, Sam seemingly accepted Henry. He even asked her to marry him after Addison and Jake had had sex. When Addison's therapist told her to make a change in her life, she met Jake and they flirted over pineapples at the grocery store. They started seeing each other at a coffee shop. However, they both agreed to keep their identities in secret.

Jake was going on vacation to Fiji and he asked Addison to come with him. She eventually accepted, but when at the airport, she realized it wasn't right to try to avoid Sam and the problems the practice was suffering.

Later on, Addison started her fertility treatment only to find out her doctor was Jake. He admitted he never left for Fiji. Addison, humiliated, left the office. When Jake interviewed for the fertility specialist opening at Oceanside Wellness, Addison was horrified because she recognized him as her former doctor. She was strongly opposed to the practice hiring him, but she ran out of excuses not to, as he was the perfect candidate for the job.

Jake began working at the practice, and Addison made him not mention their previous encounters to Sam, who she was dating at the time of Jake's arrival.

Addison began fertility treatments with Jake as her doctor. He helped her through her two failed IVFs and also to try to find a surrogate. She was extremely drunk and stumbled into his hotel room, where she asked him if he wanted to sleep with her.

He turned her down, saying that it was the alcohol talking and that she would regret it in the morning.

Cristina and Owen had already agreed that they didn't belong together anymore since they wanted completely different things in life so no one could understand why the writers were revisiting this storyline. What was even more frustrating was that Owen and Emma seemed quite happy together. It just felt like they were trying to find a way of getting rid of Emma quickly. At the beginning of Grey's Anatomy , Alex Karev was an arrogant and selfish jerk , who grossly lacked any social etiquette.

It was no surprise, then, that he ended up cheating on Izzie Stevens with the nurse Olivia after he let the pressures of the relationship get to him. Although Izzie and Alex weren't formally together at the time, they were building to something good. Izzie was also the person who convinced everyone to give Alex a second chance after she saw a softer and more vulnerable side to him.

In that light, the fact that Alex fooled around with other women while giving Izzie hope, was not cool. Nathan Riggs appeared only for rather a short time at Grey Sloan Memorial. Megan and Nathan were both revealed to have cheated on each other.

But Megan's side of the story was never really shown explicitly, while Nathan was berated time and again by Owen for having cheated on his sister. He was even revealed to have gifted Megan a necklace belonging to the woman he had cheated with. Although he did move heaven and earth for Megan after she was found alive, his history of cheating couldn't be erased. Kate Walsh joined the medical drama as Derek's wife, bringing up the third angle of the love triangle that Meredith and Derek found themselves in.

But even as the thorn in Meredith's flesh, Addison soon went on to be a beloved character and fans couldn't get enough of her. Addison was said to have cheated on Derek with his best friend Mark Sloan prior to the timeline of the show itself. She then came to Seattle to put things right with Derek. However, their marriage was soon cut short when Derek cheated on her with Meredith. Of course, had Addison never cheated, the entire MerDer storyline might never have happened, but keeping that aside, it was pretty low of her to have an affair with her husband's best friend.

If there were any fans who had actually thought that Addison and Derek could salvage their marriage, they soon lost all hope once Derek cheated on Addison. It shouldn't have come as a great surprise to people since it was quite evident that Derek was still in love with Meredith. However, instead of telling Addison that their relationship just wasn't working for him anymore, he ended up sleeping with Meredith in the on-call room. While many MerDer fans were ecstatic to see that their favorite couple were on the verge of reuniting, they didn't like the thought of Addison getting hurt.

Considering that Derek knew how it felt to be cheated on, many did think that this wouldn't be a path he would go down. It was just a bit hypocritical considering everything they had been through. Owen proclaimed his love for Cristina more than once and he did indeed love her, choosing her over Teddy - who he had always had feelings for. But when Cristina decided not to have children and then had an abortion, the latter decided to hurt her by cheating.

She took the job offer from Naomi and moved back to Los Angeles but in the beginning, not everyone was best pleased about having her there. Naomi had failed to tell the rest of the team Addison was joining them and so on her arrival, everyone was about to vote on whether or not she should stay. But after an emotional speech where she declared she wouldn't go even if she was told to by them, they decided not to vote. This was the least of the practice's problems though as it was failing financially under Naomi.

Eventually, in a bid to get the business back on its feet, Addison was nominated as the best person to lead the way and take over. So she ended up dissolving the practice, funding the change, and renaming it to the Seaside Health and Wellness.

Grey's Anatomy: Is this the last season of Grey's Anatomy? As many fans will know, Addison's time at her new job actually was the beginning of Grey's Anatomy spin-off series Private Practice. Actress Kate Walsh left the show so she could play the lead in her own series which ended up having six seasons.